X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/7f9f97c792dee6875fbca9806422bdd7d6c5a657..03ee87b35abdb8b92e8b55ec040fa943f9a6786c:/LUFA/Drivers/USB/Class/Device/MIDI.c

diff --git a/LUFA/Drivers/USB/Class/Device/MIDI.c b/LUFA/Drivers/USB/Class/Device/MIDI.c
index a01d19639..b72c2b027 100644
--- a/LUFA/Drivers/USB/Class/Device/MIDI.c
+++ b/LUFA/Drivers/USB/Class/Device/MIDI.c
@@ -65,11 +65,6 @@ bool MIDI_Device_ConfigureEndpoints(USB_ClassInfo_MIDI_Device_t* const MIDIInter
 	return true;
 }
 
-void MIDI_Device_USBTask(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo)
-{
-	(void)MIDIInterfaceInfo;
-}
-
 uint8_t MIDI_Device_SendEventPacket(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo, MIDI_EventPacket_t* const Event)
 {
 	if (USB_DeviceState != DEVICE_STATE_Configured)
@@ -84,12 +79,33 @@ uint8_t MIDI_Device_SendEventPacket(USB_ClassInfo_MIDI_Device_t* const MIDIInter
 		if ((ErrorCode = Endpoint_Write_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NO_STREAM_CALLBACK)) != ENDPOINT_RWSTREAM_NoError)
 		  return ErrorCode;
 
-		Endpoint_ClearIN();
+		if (!(Endpoint_IsReadWriteAllowed()))
+		  Endpoint_ClearIN();
 	}
 	
 	return ENDPOINT_RWSTREAM_NoError;
 }
 
+uint8_t MIDI_Device_Flush(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo)
+{
+	if (USB_DeviceState != DEVICE_STATE_Configured)
+	  return ENDPOINT_RWSTREAM_DeviceDisconnected;
+	
+	uint8_t ErrorCode;
+
+	Endpoint_SelectEndpoint(MIDIInterfaceInfo->Config.DataINEndpointNumber);
+
+	if (Endpoint_BytesInEndpoint())
+	{
+		Endpoint_ClearIN();
+
+		if ((ErrorCode = Endpoint_WaitUntilReady()) != ENDPOINT_READYWAIT_NoError)
+		  return ErrorCode;
+	}
+
+	return ENDPOINT_READYWAIT_NoError;
+}
+
 bool MIDI_Device_ReceiveEventPacket(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo, MIDI_EventPacket_t* const Event)
 {
 	if (USB_DeviceState != DEVICE_STATE_Configured)
@@ -101,7 +117,9 @@ bool MIDI_Device_ReceiveEventPacket(USB_ClassInfo_MIDI_Device_t* const MIDIInter
 	  return false;
 
 	Endpoint_Read_Stream_LE(Event, sizeof(MIDI_EventPacket_t), NO_STREAM_CALLBACK);
-	Endpoint_ClearOUT();
+	
+	if (!(Endpoint_IsReadWriteAllowed()))
+	  Endpoint_ClearOUT();
 	
 	return true;
 }